Draft control



Patented May 11, 1926,

NELSON E. WHIPPLE, OF WINDSOR, NEW YORK.

. DRAFT CONTROL.

Application filed November 4, 1925.

This invention relates to heaters, such as furnaces, steam and hot waterboilers and the like and has for an object the provision of means toautomatically regulate the draft for the fire, so as to maintain asubstantially even heat and thus economize in the consumption of fuel.

To this end, the invention provides means to automatically regulate theash pit and feed door dampers, and the draft check of the fine, the saidmeans acting to simultane- A ously open and close the draft check andall the feed door damper and to close the ash pit damper when the feeddoor damper is open and vice versa.

l/Vith the above and other objects in view, the invention furtherincludes the following novel features and details of construction, to behereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the appended claim.

In the drawings Figure 1 is a front elevation of a heater with theinvention applied.

Figure 2 is a side view partly broken away.

Figure 3 is an enlarged sectional view taken substantially on the line33 of Figure 1.

Figure 1 is a detail perspective view of the feed door lever.

Referring to the drawings in detail wherein like characters of referencedenote corresponding parts, the reference character 10 indicates aheater which may be of any type and which includes a feed door 11 whichis provided with a damper 12 and an ash pit door 13 having a damper 14.

Mounted upon the heater is a heat operated controlling member 15 whichis oper atively associated as indicated at 16 with a lever 17 This leveris mounted for pivotal movement as indicated at 18 and has one of itsends connected to a draft check damper 19 located within the smoke pipeor fine 20 of the heater, connection being effected by means of a link21.

The lever 17 is connected to the damper 14 of the ash pit door by meansof a chain 22 and as the temperature rises, the lever 17 Serial No.66,836.

will be moved pivotally to open the draft check and permit the damper14; to close so as to reduce draft through the fire.

In addition, there is pivotally mounted upon the feed door as indicatedat 23, a substantially L-shaped lever 24. One end of this lever isconnected to the lever 17 by means of a chain 25, while its opposite endhas a sliding pivotal connection 26 with the damper 12.

By the arrangement just described, when the check draft 19 is opened andthe damper 14: closed, the lever 24 will be moved pir otally due to thelength of its horizontal arm and will open the damper 12 so that thedraft will be across the top of the fire bed and not through the fire.As the temperature lowers, the controlling member will operate the lever17 to close the draft damper 19 and the damper 12 and open the damper14;.

The invention is susceptible of various changes in its form, proportionsand minor details of construction and the right is herein reserved tomake such changes as properly fall within the scope of the appendedclaim.

Having described the invention what is claimed is In a heater having adamper in the fuel feed door, a damper in the ash pit door, a draftcheck in the smoke fine, aheat con-- trolled ope-rating member and apivota .ly mounted lever associated with and operated by the operatingmember and connected with the draft cheek, means. connecting the leverand ash pit door damper to open the latter when the draft check isclosed and NELSON E. WHIPPLE.

